Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope.
It is being used in planetarium projectors. Just set your coordinates and go.
A shooting star flashes past the Jupiter. You can select different intensities in the View window.view screenshots »
The great nebula in Orion. Press N to bring up the nebula labels.view screenshots »
The dance of the planets above ESO headquarters, near Munich.view screenshots »
Full sky view of the constellations, their boundaries, the Milky Way.view screenshots »
Constellation art turned on.view screenshots »
user contributed landscapes
We have landscapes for the seven continents (in the seven continent model) - all, including from Antarctica!